Answer to Question 1
Primary witnesses are eyewitnesses to the accident.
Secondary witnesses are witnesses who did not actually see the accident happen but were in the vicinity and arrived on the scene immediately or very shortly after the accident.
Tertiary witnesses were not present at the time of the accident nor afterward, but may still have relevant evidence to present (e.g., an employee who had complained earlier about a problem with equipment involved in the accident).
Answer to Question 2
The correlation between the work environment and job performance is strong. It is this correlation that forms the basis of the rationale for TSM. Globalization has increased the level of competition in the marketplace exponentially. For many companies, adjusting to globalization has been like jumping from high school athletic competition to the Olympics.